Spring motor for typewriter carriages



Jan. 23, 1923. 1,442,880

W. F. HELMOND. SPRING MOTOR FOR TYPEWRITER CARRIAGES.

FILED FEB. 12. 1919.

Patented Jan. 23, 1923.

uieiren STATES,

F. 91" AB EORJJ coiiife qrifcnj; Toflfimnfintvqofi TYPEWB'I ER comrm, OF maw YORK, N; Y.) KCO'EPDRKTIONOF'DELAWARE.

A pncatroi'u mans mumm 12, 191-9 ser'ih l nds 276,503.

spning and to mounting? the spring barrel;

upon; itbnli bearing-,I the whole eombined'in such u manner as to simplif amh exped te assembling aiid disassembling, a's \veli as'attaehing; and detaching! t-liespring from: the nin'chine;

i One o'fvt'heobjects otth'e'inrvention is t'ov improve the means for winding; and: unwinding; the spring; This' 'hns' been cqm- 'mmi 1y done by mean's'of. w mh'iin nd' ratchet, \\'l riri'1 lm've been bulky and expensive, and which have rendered it :1 slow and difficult opemtimrtn detach the spring ba'i'rel frmi'i the machine. as well} as: limiting it, impOSSiiiTiu to manufacture the spring barrel, with: it," u ppurtenhnues', ts a snb's'tuhtihl unit, for

rend-y ,int'norhzct'ion into the" machine'- and ready detnuhnwntitihererrom for inspection ii il frepziil. I provide any meli'pilswfi epvi'rig adjustin'g device ,of compactand neart .appeal ance, not liaifle'to get out ofiorder,

ea'silfj' 0 eratefd, of few partsflimrl permitting" ready etuchment and replacement of the spring barrel in the machine, vritheiit: e n' 'ploying special tools or xrequiring special skill;

The siring, which is of. snail form; iFr

r'ohnct'zte' ntiteonter'end to the spring bar- 40 relzwhich drives the typewriter carriege; and at its inner end to an arhein which is rerohihle For the purpose of adjusting the tension of the spring. Upon this arbor I form worm-green making an annular (lo- [nvssinn or groove in the arbor, so that this your net-(i not interfere with the insertion' of H10 :u-hor in its hearing in the typowriting nmuhine nor with the detachment thereof ii'oln'tho nnuhine. With this gear meshes :1 Worm. which is formed upon a stem or shank. the latter having at its lower and iingei wheel whereby it may be rotated to i-li'ur-i rotation of the spring-arbor, and thereby :uljust the tension'of the spring.

This worm: alnd wbnmeiir arirangement is; simple, inexpensive an compact; and I have: further constructed! iti gr: manner to: permit rapid rotation 'of the 's 'ringmrbbr' when des1red as well as to low ready mounting: or dem unt-ing. .d the arbor; frunr the mircl'rihe. For these piurposesntheiwemnt hae is-maqjle yieldable gnaw-me; 13y forciblyrotating. the spring-arbor; said worm shufi m heiiee" be carried tlo s'vni 'endw-is; and the worm is' so .sh'orlt that ifl= miiy by this means bereadily driven downrvtow positionwhere it can nolonger control the werinwheela I-[enee' thehtten m'eyinde aexidenfly he forced zit-round as far its-'- des'i-reri thereby tensioning the spring; Th's 1 a'pi adjust ment of thespring-ta rbor me "be? efl'ectetl by any suitable-tool; as-wsd1'-ew-'c riveit lih'e arhor is prdvide'd a't itsmuter end with a screw; having thick in its'he'zrdg: permitting the use of? a screw-driven to rotate the uirhnr forfeits-ioning-vthespring thereon. Thu's' it is 01113 mcessury to: place the screw-driver in' the nick and rota'te'it w th; right def-urns 61L- sirerl'; the first effect being to forcethe wornvsimft down from an effective to an i|1efi'ecti\-'e p0sititm,.-whereu on the T winding ofthe's ring: by the serew niren' may-beeffccteil-i [3 continued turn'iligwf' the screwdriver. I'fiit is desired: to unwin'dthe spring: rapidly, this can also be-doneby it screw- (hirer, fitsb-by tnrning' it' t'o' the" right ti) force down the wonn and worm-shaft which may beheltl down-by raspingthe hand-wheel or k'li'ob 'prov'i'ded upon the lower end thereof" tij'us 'keepiiig the" wot-1n out of" contact "with -the-=' woi-'m-\'vhee1') and then 111 lowing thespring-:t'o,u'nw ind' itself urit'l'ei control of tiie=scrw driver.' Tlrereupqmthe handle of the worm-shaft may berelea'sed, and a: restr'minfiis'prinlg ma'fr be e'mplbyed to 1i ft the \vm'm slihft into reengii'gement with the wm-m. Sajd'worm thus aets'us-zt locking (10; or pawl for the iiorm gear; rittiie same time hem; capable-ofeffecting fine or slhw adjustments of the spring-arbor by rotating said hand-Wheel. In using: a' screw-dri er to rotate the arbor to the right-5 to wind up the carriage spring. it is nobnc'ssa-by to hold the worm out of mesh with the wormgear. as the teeth or the worm-gear will click past the end ofthe springpressed warm. the worm and worm-gear then actin; like a pawl and ratchet.

cones and ba ls thus may be assembled as a In detaching the spring barrel and arbor from the machine, said screw may first be taken out, and then the worm-shaft may be pulled down by means of the handle thereon, until the worm is disengaged from the worm-gear. Then the arbor may be drawn -forwardly out of its bearing.

In order to secure the necessary delicacy of action of the typewriter carriage, the spring barrel is mounted upon ball bearings; and the present improvements comprise means whereby the spring barrel, spring, ball bearing and arbor, with its worm-gear. may be assembled as a unit, and thus placed in the machine or removed therefrom. Upon said arbor are placed two cones, which cooperate with an interior groove in the spring barrel to form a raceway for a single cir cular row of balls. In assembling the cones and balls, the cones are forced together until play of the balls is taken up. At the same time there is effected a flattening of a copper or other soft metal C-shaped washer or wire, which is interposed between the cones, so that at the conclusion of the tightening operation this soft washer becomes of the exact thickness required to give the cones the necessary separation. It then serves to support the pressure of the cones towards each other.

There is placed upon the arbor a collar, having a'hook to catch the inner end of the carriage spring. A screw is threaded into the forward end of the arbor to press said collar against the cones and hold the Same tightly against the intervening soft washer.

The sprin barrel, spring, collar, arbor,

unit, ready to be placed in the machine. It is only necessary to slip the rear end of the arbor (which contains the depressed wormgear) into a bearing provided upon the machine frame. This is done while the worm is held down, so as to clear the way and permit passage of the arbor through the bearing. Then the Worm is released and allowed i to snap up into mesh with the worm-gear,

where it forms a key to hold the arbor in place. Thereupon the confining screw may be turned home in the outer end of the arbor. Thus it will be seen that the spring barrel is mounted upon ball bearings. and may be taken from the machine without the necessity of disassembling the balls one by one. and Without the liability of losing any of the balls, and without the necessity of the use of skill or special tools in separating the spring barrel from its tensioning devices.

Other features and advantages will hereinafter appear.

in the accompanying drawings.

Figure I is a rear elevation of a carriagedriving spring and appurtenances cnibodi ing the present improvements.

Figure 2 is a se tional rear elevation illustrating the devices for regulating the tension of the carriage spring, the parts being in normal positions.

Figure 3 is a view similar to Figure 2, but iilustrating the carriage-spring arbor as freed from the control of its regulating device, so that the arbor may turn rapidly either to the right or the left under the control of a screw-driver, or so that it may be slipped endwise out of its bearing.

Figure 4 is a perspective view of a collar placed upon the arbor, and having a hook to catch the inner end of the carriage-driving spring.

igure 5 is a part-sectional view to illustrate a soft metal wire or washer between the bearing cones which support the spring barrel.

Figure 6 is a similar view, but showing the cones forced together until the play of the balls is taken up, the soft wire washer being shown as flattened by the operation of pressing the cones together, so as to form a support of the exact thickness required for separating the cones.

Figure 7 is a screw, and Figure 8 is a worm-shaft, into the upper end of which the screw is tapped, for confining a spring which lifts or restores the worm-shaft to normal engaging or efl'ective position after it has been depressed to clear the worm-gear.

Figure 9 is a longitudinal sectional view of a housing to receive the parts seen at Figures T and 8, and to be inserted in the bracket or frame of the typewriter crosswise of the carriage-driving spring arbor, as at Figures 2 and 8.

Figure 10 is a sectional plan to illustrate the carriage spring barrel, its ball bearings, arbor, worm and worm-wheel.

Figure 11 is a side view of a C-shaped soft metal wire or Washer inserted between the ball bearing cones, as at Figure 5, and compressed by the closing of said cones togetber to take up the play of the balls, as at Figure 6.

Figure 12 is a plan of the arbor.

The carriage 20 of a typewriting machine is connected by a strap 21 to a barrel 22, containing a snail sprin 23, attached at its outer end to the barrefi and at its inner end catching over a book 24 provided upon an anchorage in the form of a collar 25. A screw 2b. tapped into the end of a reduced portion 2T of an arbor, upon which said collar his. is used for holding the collar firmly in place. so that adjustment of the tension of the spring may be eil'ectcd by turning the arbor. side plate 22" of the spring barrel is provided with a ihickened hub portion 28. ha". ing an interior V-groovo .J torn-operate wiil: cone: lll. Iii. to form a raceway for :1 single set of bearing: bulls L. The screw 21 pres-cs the i'ullzil 27 firmly against cone 30 and al o presses cone ll firmly against a Min shoulder: fioraoedr atifihe inner enrli eithenetlucetl' portion: 'ezt the arbor.

A soft metal, (*l-shwped Wire 34, such as ooppen, may be interposed;between the cones,

. as at Figure 5,.30: as to constitute a: variable dition at; Figure 5 tothe flat: condition at.

Figure 6, so that saidwire or Washer new formsa permanent spacer for the cones, of the exact thickness necessary for eliminating; play of the bearing balls. The. screw 26 clampstogether the collar 25 and the cones, with the intewening washer 34 and the shoulder 33. so that w ti-rmhearing; is afiorcled for the ba1ls,,and-so tha adjustment of the tension of the spring: 21% may be: secured by rotating the arbor, 2?, since the a-nohonage on collar 25' must turn therewith The rear end portion 35' of the arbonis r-otatahly mounted in a boss I362 formed upon a bracket 37, secured by screws 38 to the frameworkflt) of the typewriter. A shoulder -l()is formed upon the arbor to abut against the boss. 36, and prevent; endwise displacement of the arbor in: 0119- direction. llhe head of a keeper screw 41), Whichzisthreadedinto the rear endof the-arbor, prevents detachment or eudwise displaasement of the-arbor in the opposita dimetiom hen the screw 41 is unserowed from the arbor, the latter may he Withdrawn from or replaced in the boss 36.

The arbor may be normally held against rotationby means of anvomu-gear 42 formed: prel'uralihin the bearing; portion35 of the arbor, said? gear being sunkani ontl'oi'niing an annular depression in the arbor. its teeth and tooth spaces being (*oncaxe or re-entrant in t'orgm so as-not, to interferewith the detachment. or replacement thereof in the boss 36. \Vith this Worm'gear (so-operates a worm. 43, formed upon a vertical stemor; shaft 44. having at its lower end. a fingerwheel 45 for turning the same and therehyi slowly rotating the arbor 27 with the collar. '25. hook 2i and inner end of, the carriage spring 23. to adjust the tension. thereof in either direction.

The worm lliontho sbalftil l. is capahleI of wiihdrannl from mesh with the worm-gran 42;. so as toipermit rapid rotation of the ars bur-3.5. independently of said. wornn By placing a St'l'DW-(lYlVGL' in the nitric 4:6 of the screw ll the arbor may be llll'118d?t() the right. and theu'orni g'mu 4&2 thereon may thereby because] to fonce downwardly the norm l? from its normal engagrd orefl'ectire position at Figaro 2 to the disongaged. or ineflortire position at Figure 3. Thereupon the rontinuell turning of the screwdriver will cause the arbor to rotate, so that tho spring may be wound expeditiously to the desired tension. It the screw-driver is allowed to yield towards the ioi-t. a restoring spring at? will lift the Worm it, and shaft 44: from the inuih rtire position at Figure 3 into effective engagement with the wormgear. which eventually reaches the normal arbor-looking position at Figure In turning the arbor to the right. the spring 47 yiolds, so that the slida-blfe Worm -1-3 acts as a: springrpressedi pawl to permit free rotation ofthaarbol to the right or clorkwise, while checking its rotation in the opposite direction. Said spring 4'? bears up against the head of a screw 4;? threaded into a hole 49 formed in the top of the Worm-shaft is. The shaft is surrounded by said spring, and both. the shaft and spring are enclosed in a bearing member or housing 50 forming a removable mounting): oi tubular form. and divided between its ends by a partition 51. which as bored to Form a bearing; for shaft 44, which is both rotatix'e and sliding in its mounting 50; the lower end 5:! ol' the shaft being of a diameter to it in the housing. The spring i? normally holds a shoulder 53 on tho \VGlll'l-Slltllt up against the lower end of the housing. which forms a. stop at l ig n'eQ. The restoring spring: +7, confined by the head of the screw it? abuts against the partition 5i. \Vlllt'll 'lormsa stop For liniitingtihe downward movement of the wormshaft 44'. as in Figure 3. it is therefore seen that those stops (Formed by tho lowor and of the housing 54) and by the partition 53 therein} constitute means for limiting tho movvment of thrworin for play or lost motion botwoen its two pi'isitiuns. aid housing has a lateral perforation or opening. as at. 55L, which may lit the arbor. so that said. arbor lo-uks the housing: against detachment from the blanket 3T. Said bracket is formed at its upper end with a Boat into or against which the upper Miliilfgiii end of am housing iswlepressod when the parts are assembled. \Yhon tho arbor is Withdrawn, the housing may be lii'ted out from the brat-hot; the screw 18 being first detached, and the ormrshnft ii being: pulled down out ol the housing. The \YfiillhSllfii'i may bv locked against rotation by means of a set srrew 56, threaded into tho braokrt and passing through an opening ST in the housing. and bearing against the lower portion 5:. of tho Worm-shaft. The honsin; an is provided with an aporturod partition 55. and surh partition. spring; iii. and srrow lH vonstitulo moans for retaining the worm-shaft 4-4 in the housing.

in operation. the St'i'tn 3b may be released and tho liarid-wlieol 4-5 may be rotated vsliilo in the normal Figure 2 position. to effort slow rotati'vo adjnstnunt of tho arbor QT. and thereb increase or diminish the ion- [lib sion of the carriage spring 23; or a screwdriver may be inserted in the screw 4:1 and the Filll'li turned as far as desired to the right ini'le 'iendently oi the Worm 43, since the ir wiil iorrr said \vorin down out oi the var i at. Figaro l. against the tan- Finn of tho rest ring spring: 4-7, the teeth of the wornrgrar ii then slipping past the end of the sp" -prrss'd slidnhle Worm 45, which acts as .i pawl to permit rotation ot' the arbor in one direction while checking or preventing its rotation in the opposite direction. Tho hand-Wheel may be grasped and hold own during the springwinding operation, and also during the un- Winding of the spring: under the restraint of thr srrmr-drivcr. if desired.

Upon removing the screw 41. the arbor may he pulled forwardly out of the boss 36; the hand-wheel 1-5 having first been grasped to pull down the worn to the Figure 3 position of discngragomont with the gear, so as to permit the endwise withdrawal of the arbor. normallv the worm rinistitntes at her to prevent roinz'ival of the arbor. 'ihlls. the spring barrel may he cmiveniently and expeditiously removed from the mai-hino or replaced therein nithont tho use of s rrial tools. or the reqnirrment of special skill or rxperienc'o. Tho Worm-shaft may be readilv rrmovell after first having tat-Len out the soreiv 49; and the housing: 50 may be also readily lifted out oi its sorlzet in the bracket 37 after the rrmoval of the arbor. Thus. it will he soon that the spring barrel. spring, ball bearings. :ti'lmr d dj tin gear. may be mannhnrtured as a unit and so plared in the machine or removed thorotrom. and that other spring barrels m? dii'- irrent dianzotrrs may be su stitntoi'l when required. by simply ia 'ing out ne unit and wfistitntin; another tl rator in the machine.

ariations may he resorted to within the scope of the invention, and portions of the improvements may he used Without others.

Having thus described my invention, l claim:

In combination. a typeWriter-carriagepropelling spring. a harrel therefor, an arhor for said rel. said arbor being; connerted to said spring i'or i'ensioning the annn a Worm-grainpon said arbor. and a worm n rmallv in an eii'ectivc position incshina with said own to rotate the arbor. said Aoini QiHLE provided with means for turning the same and being permanently monntsl r a bodily rm rnent from its eti'ective position in mosh r;ith said gear to an ineii ecii'ro position oe herefrom to proridr tor tho iiidrnrndrnt Ti in of said arhor.

' in winhinai on. a t' rpsiv,iter-rzirrianr- 7 i i in; .5 birrslt rotor. a :irlior tor said arrol. said arbor in ronnerted to said spring for icidioning tho some, a

worm-gear upon said arbor, and a worm lltillntllly in effective position meshing with said gear to rotate the arbor, said Worm bc ing provided with means for turning the same and being permanently mounted for movement from its eftertive position in mesh. with said gear to an ineifective position tree therefrom to provido for the independent rotation of said. arbor, said arbor having separate means whereby it may be rotated under control for adjusting the tension of the spring when said worm is moved to its position free from said ear.

3. ln combination. a t rpewriter-carriagepropelling spring. a barrel therefor. an arbor for said barrel. said arbor being connected to said spring for tensioning the same and means for rotating said arbor. said means comprising a Worm-gear upon said arbor and a worm provided with a iingenpieoc, and means for permanently mounting the worm for movement between a position in which it meshes with said gear and another position in which the gear is freed from the control thereof to provide for independent rotation of the arbor. said wornr-gzoar beingdeg'iressil'ilo below the cirrnmterenre of the arbor to permit insertion or Withdrawal oi the arbor from its hearin g when the Worm is moved to its position l PPE from the worm-gear.

4. In rombination. a typewriter carriage propelling spring, a barrel therefor, an arbor for said barrel, said arbor connected to sai spring: i'or ti-nsioning the same, a Worm gear upon said arbor. a worm provided with a [ingvr-picrc and meshing with said gear and movable to fire the gear From the control thereot. and a spring tending to restoro said worm to normal etlortiro position,

5. ln combinatiom a typewriter-carriagri'iroprlling spring. a harrcl therefor. an arhor for said barrel. said arbor lining mnnected to said spring for tcnsion ng the same, a bearing For said arbor; a Wormupon said arbor. a worm normallv in an effective position meshing with said gear to rotate the arbor. hearings for the worm, and means for retaining the worm in its hearings, said Worm boing provided with means for rotating the same and said retaining; means being mmstrncied to enable the worm to nndrrpjo a bodily liluflliiijllt oi' translation between two pt itions in our of which it ronstitni'rs means imretaining said arbor in place in said bearing and in the othrr of which it permits independent rotation or Withdrawal ot' Hiltl arbor,

G. In combination. a typi- Titer-carriage propciiing spring. a harrrl therefor. an arbor for said barrel. said arbor being: ronnested to said spring for ionsioning the same. a worm gear upon said arbor. :1 worm normali in otiotii'irr position m shing with said gear to rotate the arbor, said worm ion tmaseo being provided with means for rotating the same. a mounting l'o'r said worn] in which said worm is bodil v movable from its effective position in mesh Withsaid gear to an ineffertive posit on tree therefrom to provide for the independent rotation of said arbor. a bearing for said arbor. a, shoulder on aid arbor to abut against said bearing. and a fastening device "omperatlug with said shoulder to confine said arbor in said bearing. said fastening) device also atl'ording; a hold to enable the rotation of the arbor to be controlled when said Worm is moved to its position free from said gear.

7. In combination, a type writer carriage propelling): spring. a barrel therelor. an arbor l'or said barrel. said arbor (-onneeted to said spring for tensioning the same. a worm gear upon said arbor. a Worm provided with a linger-piece and meshing with said gear and movable to free the gear from the control thereof. said arbor having separate means whereby it may be rotated under control for adjusting the tension of the spring. and a spring tending: to restore said worm to normal ell eetive position.

8. In combination. a typewriter carriage propelling spring. a barrel thereloia an arbor for said barrel. said arbor ironneoted to said sprin t'or trnsioning the same. a worm gear upon said arbor. and a worm provided with a lingg er-pirro and meshing with said .nrai' and niovahle to tree the gear from the rontrol thernet. said arbor mounted in a hearing and having a part to confine it in said bearing. said part constructed to be operable only by a tool. to control the rapid rotation of the arbor.

9. In (-on'1lination. a typewriter-rarriagrepropelling spring. a barrel the efor. an arbor for said barrel. said arbor being connected to said spring for trnsioning the same. a wornngear upon said arbor. a worm normally in etlertive position meshing with said gear to rotate the arbor. said worm bein;- provided with means for turning the same. and a mounting tor said worm in which said worm bodily movable from its efi'ective position in mesh with said gear to an inefleetive position tree therefrom to provide tor the independent r tatitm of said arbo said arbor having separate means whereby it unrv be rotated under control for adjusting the tens on ol" the spring when said worm is moved to its position free from said gear. and whereby said worm will be automatically moved by said near to it pos tion tree From said gear to permit such adjustment.

l0. The omhinution of a tvpewritermarriser-driving spring. a barrel ther for. an arbor. said barrel being: mounted upon said arbor by means of ball bearings. a bracket or fixture having a bearing in which said arbor is rotatably mounted. said arbor, ball bearings. spring and barrel being attachable or detachable as a unit in their assembled relation. and said arbor having an adjusting device comprising a gear sunken in the arbor. to permit its withdrawal from said bearing, and a worm mounted in said bracket or fixture normally in position to engage said gear to rotate said arbor and being permanently mounted for inovenient to disengaging position in said bracket or fixture to permit independent rotation or Withdrawal of said arbor.

11. The combination of atypeWriter-carriage-driving sprin". a barrel therefor, an arbor. said barrel being mounted upon said arbor by means of ball bearings. a bracket having a bearing in which said arbor is rotatably mounted. said arbor. ball bearings. spring and barrel being attachable or detachable as a unit in their assembled relation. and said arbor having an adjusting device comprising a gear sunken in the arbor, to ern'iit its withdrawal from said bearing. a worm mounted in said bracket normally in position to engage said gear to rotate said arbor. said worm being bodily movable to disengaging position in said brarket to permit independent rotation or withdrawal of said arbor. and means for limiting the movement of said Worm between its two said positions.

12. in combination. a typewriter. carriage driving spring. a barrel therefor. an arbor. a pair of (ones upon said arbor. said spring barrel having an interior groove. balls inserted between said cones and said groove. a compressible separator between said cones, a rollar upon said arbor. said arbor having; a shoulder. and a screw threaded into the end thereof. said cones. separator and collar being (unlined between said shoulder and the head of said screw. the ('ombined axial di mensions of said ('Olltll". (ones and separator beinn greater thanthe distance between said shoulder and theend of said arbor. so that said s-L'rtwv may firmly clamp them in fixed relation therewith.

iii. The rombination of a typewriter rarriage driving s iring. 'a barrel therefor. an arbor. a pair of cones upon saidarbor. said spring barrel having an interior groove. balls inserted between said cones and said groove. a roller upon said arbor. said arbor having a shoulder. and a sorew threaded into the end of said arbor to press said 001- lar and said cones against said shoulder. a soft metal washer being inserted between said roues and flattened to a point where the (ones are suliioiently rlose together to nil-w up the play of the balls.

14. In combination. a earriage driving spring. a spring barrel. an arbor. a oollar upon said arbor having means to catch the end of the spring. "ones upon said arbor.

said barrel having a groove to cooperate with said runes. halls inseried between said (ones and said groove. a apaeing medium heineeu said runes a iiniiing sing on said ar hor. and a HH'QW to hold said rollar. runes and spacing medium rlamped in position between said screw and said stop. said elements forming a unit "for detachment from or atfarlr men! t a machine in their assembled relalion.

'15. A carriage-ilriving spring. a spring barrel. an arbor formed with a. forwardlyfaring shoulder. a bearin; lot the arbor disposed rearwardly of said shoulder. a. removable (-ollar upon said arbor having: means to rah-h the end of the spring. reinorable i ones mounted upon said arbor between the collar and said shonhiier and sen aratel from said eoilar. said barrel having a groove to (o-operate with said cones, balls inserted between said (ones and said groove. a screw to hold said F'Iillil! and cones in po' sition against said shoulder and thereby to retain said barrel on the arbor by means of said balls. and a sunken gear provided in said arhor to permit the insertion and witlr dra 'al of the arbor. said gear forming a part of an arbor-rotating device. said elements forming a unit for defaelnneni' from or atiarlnnenf to a marhine in their assembled relation.

barrel. an arbor formed with a. 'lor\\ai ll Faring shoulder. a bearing Fo said arbor disposed rearwardlr of said shoulder. a eollar upon said arbor having means to catch rhe end of the s ring. cones mounted direct upon said ar bor. between the co lar and said shoulder. said barrel having a groove to ro-operaie with said cones. balls inserted between said cones and said groove and serving to retain said barrel on the arbor. a screw to hold said oollar and cones in position. a gear upon said arbor. said ole nlents forming a unit for detachment from or attaclnnent ro a machine in their assem led relaiion. and a worm normally in an eil'eetire posiiion to engagn said gear in ioiaie said al'lu'it'. said form being Imdih movable in an inefieelii'e pogiiinn lo M the gear.

l".li':lj--l'll 'i\in c wrirr cari l srrel an .ll'lifll a Rollin upon Z ii ai' n has n IHEQIW in rat h The er oi i w spun". P0119; up n said Illllfll', sa d ni'rai having a groove t eeroprraie n'ilh sa d inserleil between said (ours and said Lf a servo to hold said rolla and w nes in no sition. a gear upon said arbor. z-aid elennnls forming :1 nnir for i'leiar'lnneni i'ronl or altarlnnent in a maehine. a worm in engage said gear. said worn] movable in release H e gear. a shaft upon whirh said worm i-.- formed, a spring for holding said shar't in efiective position. and a handle upon said shaft.

i w nes. lit! l r 2-1. carriage-driving spring. a spring barrel. an arbor, a eollar upon sa a h having means to catch the and of {he spring. i-ones upon said arbor, said barrel having a grooveto ran-operate with said cones. balls inserted i'ietween said (ones and said groove. s rew to hold said (Uiifll and oones in position. a gear upon said arbor. said eiemenis 'Forn'iing a unit for detachment from or attarhment To a machine. av Worin to engage said gear. said worm movable to release the gear. a shaft upon whirl] said worm is formed. a spriir; For hoiding said shaft in efleetiro posiiion. a. handle upon said 5d all. and a housing: in which said shall is mounted to rotate and move endwiso.

l9. bracket. :1 earriaprealriring spring. a spring barr l. on arbor. means noon sai arbor to eatch the end of the spring. a near provided unon said arbor to permit h in" seri on and withdrawal of the arbo said elements forming) a unit iloia hiiient from or aiytarhinenli to said brai liei. a worm to engage said gear. said Worm movable to releasii'hr gear. a shaft upon whieh id worm is forn'led. a spring for holding: sa d shaft in efleelire position. and a h using in whirl; said shaft may roiafe and more en il spring barrel. an arbor. means upon mid arbor to rai'oh i'he end ol' i'h iJl'llf. a war iinYidmi d am said arbor in wrmii ihe 1H s ri' on and niilidrawz'll of the arbor. said elements Forming: a unii i deiwhmeni from or at'i'arhment to said lirarkei'. a worm in engage aid gear. said worm movable in release the gear. a shall main whir'h said worm i forined. a pr ng for holdinrf aid. shah in effective position. and a housing in whirl! said. sha I"? may rotaie n l nini'o end wise. said hiaeker having; a sea! For said housing. and said lrmsing baring; an open inn to engage he pe iphery of said i ivii' to be lorh'e l thereby in i" no hraohoii.

Ql. ln'zn-kri. :1 i'flfl' t ii -(il'l.iilg spring. :1 g rin lrlarrel. an arbor. means upon said arbor in v i-loll be mad o5 iii-7 n 'wfiefi upon gg ii-l arbor in ne mii (he eri i n and \Yifhdi annl oi the le n lgfrz i 'l' 'il i bj :2 uni! i i' from n in engage hlllfli om. xii-l ini'in movable in release illl g ar. a shall upon i lif'l! said WHEIH is (owned. a Hlil'lllff {or ho ding said shall in idl wlire iuailion. :2 housing: is: \i'h rh said shai i. may rolaie. and more end wise aid braid-w? having a sea for said housing. and li l housing; il:l\'il' 5 an opeir ing: to engage he periphi-iry of said ar or to he loi-hed illereby' in ithe bracket. and a sei si-irw passing through an opening in said housing to engage said shaft to look the same.

Hill

illr 1 .wsm n The ooraluinaiihm of a tta gre mrilm carriage-dri vzing spring. a barrel thm'e t'or. an arbor. a bracket having a bearing in which said a-arbor is rotatably mounted. said arbor harinp an adjusting derive coinpris ing a gear in position to pe it the with drawal ot the arbor from said beari-r-rg. an endwise Hlllfttll'llt worm mounted in said bracket nm'malily in position to engage said gear to rotate said arbor. bearings for the WUHEI]. and means for retaining: the "worm in its bearings. said retaining means being ('(mStIHGtutl FbU penrnit the worm .to shift endwise while aaantined b said retaining means. thrreby to tree itself from the gear and permit independent I'Otz-Ltdnil or Wit-hdrawal of said arbor.

riage driving: spring. a barrel thoret'or. an arbor. a brarlcet or liatnra having a bearing on Whirh said arbor is rotatably mounted. said arbor. spring and barrel being attawxlr able or detadlnablv as a unit. and sai-vfl' a rl i'o'r having an adjusting device comprising a gear included in said unit and in position to permit tho withdrawal of the arbor from said bearing. and a worm monntedin said bracket or fixture to engage said gear and movable to disengaging: poi itoa. said arlm being detarhahl landlord in said brat-la. by means of a serva- Whirl! is also i-apzrblr of rontroliing the adjustment of lhr arbor and sprin 24. A spring-motor tor a t ;pewritvr-earriage. comprising. in combination. a, motorspring. an arbor rotatable to adjust the motor-sprin a support rmnprising: a hearing]; for said arbor. the portion of said arbor mounted in said bearing having rt entrant teeth forming a worm-gear worm normally IUESlllfig with the worm-gear and rapable oi' preventing ondwise renmral of said arbor from said hearing. and retaining means "For th. worm. said worm being mounted for rotation. and sairlretaining means being constri'lrted to enable the warm to be moved endwise to a. difl'erent position tree from said gear. so as to permit independent rotation or withdrawal thereof.

25. A spring: motor tor a typewriter rarriage comprising. in coinbinatitm, an arbor rotatable to adjusttlw motorspring. a support t-mnprising a bearing for said arbor. thr port-inn oi said arbor inc-muted in said bearing having ronuare teeth forming a norm gear sin-h as will permit endrvise re moral of said arbor from said bearing. a worth. and a bearing for said Worm removable rndwise from said support. said arbor when in plat-r in its bearing roi istitnting a key to hold said worm-lwa ing: in plarv. said worm being mounted for both rotation and malaise movement in its bearing. said Worm being IlOtTflflllY in mesh with said Wormgear and constituting a key to prevent removal of said arbor from said hearing. said Worm being onwabie endwise in its bearing to a diii'orent position .tree from said gear. so as to permit independent rotation thereof or arithdrawal 0t said arbor from its bearing. and :aaid norm and its bearing; being; remorable from said support on ronioral of said arbor.

26. In rombinatiion. a typewriter Carriage driving spring. a barrel therefor. an arbor. a removable hall-hearing by Wllitll said harrel is joi-iri'niled on said arbor. a. removable collaron said arbor. said spring: being eonnoted at one end to said barrel and at the other to said roilar. a shoulder on said arbor.

and a fastening device at its end for swearing mid ball-hearing: and said rollar on the arbor and clamping then: agaiwt said shoulder. all of said parts being; attaclnible to and detachable from a typewriter frame as an assembled unit.

27. In combination. a typewriter-(arriagw propelling spring. a bariel therefor. an arbor tor said barrel. said zl lri. being connected to said spring! or tensioning the same. a Worm-gear upon said arbor. and a worm proridnd with a llllIGl'-}]l(("t and norirallr meshing with said gear and movable to tree the gear from the ('ontrol thereoi' antomatirailr by indvpemlent rotation oi the you r in one direction.

28. o combination. a typen'ritvra arriage propelling apringr. :2 ha rrrl therefor. an an hor for said barrel. said arbor being mm Ina-ted to said s ding for tri'isioningrthr sain a norm ear upon said arbor. a worm nor mally in an (lint-tire position mesh ng with said gear to rotate the arbor. said Worm being provided with means to! turning the same. and a mounting): for said worth in X'l'lltll said \YOZIH is bodily movabl endwise in one direr'tion into engagemvnt with said Willl"fi1'(2ll' to rotate the arbor in either dirertion and int lurking!" the latter against. rotation in one dirw-tion. said worm being: bodily movable endwisv in the opposi tw direction by indeprndent rotation of said \VOTIH-gfll in the other dirertion so as to provide for rotating tlw latter independentl v of the worm.

99 i ('(ifllllinilllllll. a l xpmrrilvra-arriagi propelling? spring. a barrel tbtrrl'or. an an hml'or said barrel. said arbor bring: (on nr trd to said spring Fo lonsioniin: the same. a \\'or|n- .g:nar upon said arbor. a. worm normally in an viiert w position meshingwith said gear to rotate the arbor. said worm being provided with means for turning the same. a mounting for said Worm in whi-h said worm is bodi am able mnlwisv in one dirrrli n inlo an otter-t re position in engagnanunt with said \VOl'lll-gftll to rotate the arbor in either direr-tion and for lorking); the latter against rotation in one dirertion and which is bodily movable endwise in the 0p- Ill] Hill

Ill)

posite dirertion to an ineffective position out of engagement with said worm-gear by inh pendent rotation of the worm-gear in the other direction thereby to provide for independent rotation of the latter. and means for limiting the endwisc movement of said worm for play between its two said positions.

32). 1o ('ombinutlou. a typewliter-carriagepropelling spring. a barrel therefor, an arbor for said barrel. said. arbor being connected to said spring for tQDSlOllliifl the same. a worm-gear upon said arbor. a worm normally in effective position meshing with iid rear to rotate the arbor. said worm being provided with means for turning the same. a mounting for said worm in which said worm bodil movable from its offer!- tive position in mesh with said gear to an. ineffective position tree therefrom to provide for the independent rotation of said arbor. said arbor having separate means whereby it may be rotated under control for adiustine' the tension of the spring when said worm is moved to its position tree from said gear, and means for limiting the movement of said Worm for play between its two said positions.

Ell. Tn rombination. a typewriter-carriae'e-propelling spring. a barrel therefor. an arbor for aid barrel. said arbor being) connected to said spring for tensioning the same. a worm-near upon said a bor. a Worm imrnially n efl'e tive position meshing? with said gear to rotate the arbor, said worm being provided with means for turning the same. a mounting for said worm in which said worm is bodily movable from its effective position in mesh with said gear to an iui-ll'ectiro position free therefrom to provide for the independent rotation of said. arbor. said arbor having separate means whereby it may be rotated under control for adjusting the tension of the spring When said worm is moved to its position free from said gear. and whereby said worm will be antomatirally moved by said gear to its position free From said rear to pe mit sueh adjustment. and means for limiting the movement of 'li n m for p ay be ween its: two said p0,-.ions.

32!. In (:ombination. :1 rings-pro :ellim; spring. 1-! barrel therefor. an arbor for :aid barn; said arbor being: notion-ted to said spring for tensiouing the same. a wornngear upon said arbor. a worm normally in effective position meshing: with said gear to rotate the arbor. said Worm beiug provided with means for rotating the same. a mounting" for said worm in which said worm is bodil -g movable from its offe s live position in mesh with said gear to an inetlertixe position free therefrom to provide for the independent rotation of said arbor. :1 bearing for said arbor a shoulder l v e ritenca 1' on said arbor to abut against said hearing. a fastening device copperating with said shoulder to confine said arbor in said hearing. said fastening device also affording a hold to enable the rotation of the arbor to be routrolled when said worm is moved to its position free from said gear. and means for limiting the movement of said worm for play between its two said positions.

33. A carriage-driving spring. a springbarrel, an arbor. a collar upon said arbor having means to catch the end of the spring. cones upon said arbor. said barrel having: a groove to co-operate with said cones. hearing balls inserted between said cones and said groove and serving to retain said barrel on the arbor. a. screw to hold said collar and cones in position. a gear upon said arher. said elements forming a unit for detachment from or attachment to a machine in their assembled relation. a worm normally in an efiective position to engage said gear to rotate said arbor. said worm being bodily movable to an ineffective position to release the gear. and means for limiting the movement of said worm for play between its two said positions.

34. The combination of a typewritencarwage-driving spring. a barrel therefor. an arbor. a bracket or fixture having a hearing' on whirl] said arbor is rotatably mounted. said arbor. spring and barrel being attat-l1 able or detachable as a unit in their assembied relation, and said arbor having. an adjusting device comprising a gear included in said unit and in position to permit the withdrawal of the arbor from said bearing. a worm mounted in said bracket or fixture normally in position to engage said gear to rotate said arbor and being bodily movable to disengaging position to permit independent rotation or withdrawal of said arbor. and means for limiting the movement of said worm for play between its two said positions.

35. A spring-motor for a typewriter can riage comprising. in combination. a motorspring. an arbor rotatable to adjust the motonspring. a support comprising a hear ing for said arbor. the portion of said arbor mounted in said bearing having reentrant teeth forming a worm-gear such as will per mit endwise removal of said arbor from said bearing. a. worm mounted for both rotation and endwise movement between two posh tions in said support. said worm. when in normal position. being in mesh with said gear and constituting a key to prevent removal of said arbor from said bearing. said worm being movable endwise to a different; position free from said gear. so as to permit independent rotation or withdrawal thereof. and means for limiting; the movement of said worm for play between its two said positions.

36; A carriage-driving spring. a spring barrel. an arbor. 'a collar upon said arbor having means to catch the end of the spring, cones upon said 'arl'ionsaidbarrel having a "groove to (o-operifte with said cones, bearin balls inserted between said cones and said grb'bi e and serving to retain said barrel on the arbor. a screw to hold said collar and cones in position. a gear upon said arbor. said elements forming a unit for detachment from or attachment to a machine in their assembled r lation. and a worm normally in an effective position to engage said gear to rotate said arbor. said worm being bodily movable to an incfl'ectivc position to release the gear automatically by independent rotation of said gear in one direction.

37. The combination oi a typewriter-- carriage-driving spring. a. barrel therefor. an arbor a. bracket or fixture having a bearin; on which said arbor is rotatably mounted. said arbor. spring and barrel being attachable or detachable as a unit in their assembled relation. and said arbor having an adjusting device comprising a gear included in said unit and in position to permit the withdrawal oi" the arbor from said bearing. and a Worm mounted in said bracket or fixture normally in position to engage said gear to rotate said arbor and bein g bodily movable to disengaging position to permit indepeniilent rotation or withdrawal of said arbor automatically by in dependent rotation of said gear in one direction.

, 38. In combination. a typeivritor-carriagepropelling spring. a barrel therefor. an arbor for said barrel. said arbor being connected to the spring for tensioning the same. and means For rotating the arbor to adjust the tension of the spring. said arbor being constructed for rotation independently of said rotating means. and said rotating means being mounted for movement by the arbor out of operative engagement therewith upon independent rotation of the arbor.

39. In combination. a typewriter-carriagepropclling spring. a. barrel thcre'ior. an arbor for said barrel. said arbor being connected to the spring for tensioning the same. and means for rotating arbor to effect relatively minute adjustments in the tension of the spring. said arbor being specially fitted or shaped for engagement by an appropriate tool tor relatively rapid rotation thereof independently of said rotating means. and said rotating means being mounted for movement by the arbor out of operative engagement tl'icrcwitb to enable the arbor to be rotated at relatively rapid speed without interference by said rotating means.

4). In combination. a typewritier-carriagepropelling spring, a barrel therefor an arbor for said barrel. said arbor being con nccte l to the spring for tcnsioning the same and being constructed. to enable it to be rotated at a relatively rapid speed and thus enable the tcnsion of the spring to be quickly varied Within a Wide range. and means connected with the arbor for rotating it to effect relatively minute adjustments in the tension of the spring.

41. In combination. a. typewriter-carriageprop lling spring. a barrel therefor. an arbor for said barr l. said arbor being con nectcd to the spring tor tensioning the same and being constructed to enable it to be rotated at a relatively rapid speed. and means for rotating the arbor to eticct rela tively minute adjustments in the tension of the spring. said rotating means being movable from operative to inoperative position by rotation of the arbor.

In combination. a typexvriter-carriagepropelling spring. a barrel therefor. an arbor for said barrel. said arbor being connected to the spring for tcnsioning the same and being constructed to enable it to be rotated at a relatively rapid speed. and means for rotating the arbor to effect relatively minute adjustments in the tension oi the spring. said rotating means being mounted for movement by rotation of the arbor in a direction to increase the tension of the spring to a position in which it permits rotation ot the arbor independently of said means either in a direction to increase the tension of the spring or in a direction to decrease the tension oi the spring.

43. in combination. a typewriter-carriagepropelling spring. a barrel therefor. an arbor tor said barrel. said arbor being conne ted to said spring for teusioning the S51E14. worm-gen r upon said arbor. a worm meshing with said gear. a shaft carrying said worm. bearings for said shaft in which the shaft is longitudinally movable by rotation oi the arbor to carry the worm out of meshing engagement with said gear. said arbor being rotatable independently of said Worm. and means for normally retaining the shaft in position for meshing engagement of said worm and \vornrgear.

44 In combination. a typewriter-carriagepropelling spring. a barrel therefor. an arbor for said barrel. a bearing for said arbor. a gear on said arbor. and a worm meshing with the gear. said worm being mounted for movement to inciiective position by rotation of the arbor in one dircction.

45. in combinatiim. a typewritencarriagepropelling spring. a barrcl therefor. an arbor for said barrel. said arbor bein s connected to said spring for tcnsiouing the same. a gear on said arbor. and a Worm cooperative therewith for rotating the arbor to effect relatively minute adjustments of the tension of H19 spring. will worm being shiftabie by the gear at any rotatiu-i posh tion of ihr la'lfer to a releasing potition, to permit rapid rotation of tho arbor.

43. in combination. a VPPWI'iiGP-i'ill'l'i21:5 3- propeiiing spring :1 barrel therefor, an arbor for said barrvL said arbor being ennnecteri to said. spring for tonsioning the sinner and means for rotating the arbor, said 10 rotating means comprising a worm-gear on awns) um arbor and a worm, band arbor being r0 tumble in one direction indepndently of said worm. and means connected to the worm for shiftii'ig it to a releasin position, to permit iudqiendrnt, rotation 0 the arbor in either 15 

